US9919610B1ActiveUtility
Wireless power electronics and controls
Est. expiryJan 12, 2037(~10.5 yrs left)· nominal 20-yr term from priority
B60L 2210/30Y02T90/14B60L 53/22Y02T10/7072H02M 5/275H02M 1/083H02J 50/90H02J 50/12B60L 2210/40H02J 50/30B60L 11/182Y02T10/70Y02T10/72Y02T90/12B60L 53/12
95
PatentIndex Score
46
Cited by
166
References
17
Claims
Abstract
Magnetic-coupling-based wireless power transfer systems and schemes are provided that ensure fast wireless power transfer to charge batteries of electric vehicles (EVs) with high power transfer efficiencies and safety to humans and other animals in or near the EVs. A wireless power transfer system can include a direct 3-phase AC/AC converter with a circuit topology that enables bidirectional power flow. The direct 3-phase AC/AC converter can convert a power input at a low frequency, such as 3-phase 50/60 Hz, into a power output at a high frequency, such as a frequency in a range of 10-85 kHz for wireless power transfer applications.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A method for direct three-phase ac-ac matrix conversion for inductive power transfer (IPT) comprising:
providing a three-phase ac-ac matrix converter including:
a first line, a second line, a third line, and a fourth line, all of which are connected in parallel;
a first phase input connected to the first line and having a first phase input voltage (V g ), a second phase input connected to the second line and having a second phase input voltage (V b ), and a third phase input connected to the third line and having a third phase input voltage (V c );
a first switch (S A1 ) and a second switch (S A2 ) connected in series on the first line and on opposite sides of a first phase input connection;
a third switch (S B1 ) and a fourth switch (S B2 ) connected in series on the second line and on opposite sides of a second phase input connection;
a fifth switch (S C1 ) and a sixth switch (S C2 ) connected in series on the third line and on opposite sides of a third phase input connection; and
a seventh switch (S F ) on the fourth line; and
a seventh diode (D F ) that is in parallel with the seventh switch (S F ) on the fourth line in the three-phase ac-ac matrix converter;
providing a reference current (i ref );
providing a reference voltage (ν ref );
providing a reference power (P ref );
measuring a peak output resonance current (i p ); and
changing how current flows through the three-phase ac-ac matrix converter based on one or more control modes,
wherein the three-phase ac-ac matrix converter operates in a current regulation control mode according to rules in the following table:
SWITCHING STATES IN DIFFERENT MODES OF OPERATION IN
CURRENT REGULATION CONTROL MODE.
Conducting
Mode
Resonant Current
Input Voltages
Switches
1
i p < 0, |i p | < i ref
V b < V c < V a
S A1 , S B2
2
i p < 0, |i p | < i ref
V c < V b < V a
S A1 , S C2
3
i p < 0, |i p | < i ref
V a < V c < V b
S B1 , S A2
4
i p < 0, |i p | < i ref
V c < V a < V b
S B1 , S C2
5
i p < 0, |i p | < i ref
V b < V a < V c
S C1 , S B2
6
i p < 0, |i p | < i ref
V a < V b < V c
S C1 , S A2
7
i p < 0, |i p | > i ref
—
D F
8
i p > 0
—
S F .
2. The method according to claim 1 , wherein the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch are all reverse blocking switches, each including an insulated gate bipolar transistor (IGBT) or a metal oxide semiconductor field effect transistor (MOSFET) in series with a diode.
3. The method according to claim 1 , wherein the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch are switches with built-in reverse blocking functionality.
4. The method according to claim 1 , wherein the control modes include a current regulation control mode, a voltage regulation control mode, and a power regulation control mode.
5. The method according to claim 4 , wherein the control modes are based on zero current switching operations or resonant zero crossing points.
6. The method according to claim 1 , further comprising:
measuring output power (P out ).
7. A method for direct three-phase ac-ac matrix conversion for inductive power transfer (IPT) comprising:
providing a three-phase ac-ac matrix converter including:
a first line, a second line, a third line, and a fourth line, all of which are connected in parallel;
a first phase input connected to the first line and having a first phase input voltage (V a ), a second phase input connected to the second line and having a second phase input voltage (V b ), and a third phase input connected to the third line and having a third phase input voltage (V c );
a first switch (S A1 ) and a second switch (S A2 ) connected in series on the first line and on opposite sides of a first phase input connection;
a third switch (S B1 ) and a fourth switch (S B2 ) connected in series on the second line and on opposite sides of a second phase input connection;
a fifth switch (S C1 ) and a sixth switch (S C2 ) connected in series on the third line and on opposite sides of a third phase input connection; and
a seventh switch (S F ) on the fourth line; and
a seventh diode (D F ) that is in parallel with the seventh switch (S F ) on the fourth line in the three-phase ac-ac matrix converter;
providing a reference current (i ref );
providing a reference voltage (ν ref );
providing a reference power (P ref );
measuring a peak output resonance current (i p );
measuring a peak output resonance voltage (ν p ); and
changing how current flows through the three-phase ac-ac matrix converter based on one or more control modes,
wherein the three-phase ac-ac matrix converter operates in a voltage regulation control mode according to the rules in following table:
SWITCHING STATES IN DIFFERENT MODES OF OPERATION
IN VOLTAGE REGULATION CONTROL MODE
Resonant Current &
Conducting
Mode
Current
Input Voltages
Switches
1
v p < 0, |v p | < v ref
V b < V c < V a
S A1 , S B2
2
v p < 0, |v p | < v ref
V c < V b < V a
S A1 , S C2
3
v p < 0, |v p | < v ref
V a < V c < V b
S B1 , S A2
4
v p < 0, |v p | < v ref
V c < V a < V b
S B1 , S C2
5
v p < 0, |v p | < v ref
V b < V a < V c
S C1 , S B2
6
v p < 0, |v p | < v ref
V a < V b < V c
S C1 , S A2
7
v p < 0, |v p | > v ref
—
D F
8
i p > 0
—
S F .
8. The method according to claim 7 , wherein the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch are all reverse blocking switches, each including an insulated gate bipolar transistor (IGBT) or a metal oxide semiconductor field effect transistor (MOSFET) in series with a diode.
9. The method according to claim 7 , wherein the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch are switches with built-in reverse blocking functionality.
10. The method according to claim 7 , wherein the control modes include a current regulation control mode, a voltage regulation control mode, and a power regulation control mode.
11. The method according to claim 10 , wherein the control modes are based on zero current switching operations or resonant zero crossing points.
12. The method according to claim 7 , further comprising:
measuring output power (P out ).
13. A method for direct three-phase ac-ac matrix conversion for inductive power transfer (IPT) comprising:
providing a three-phase ac-ac matrix converter including:
a first line, a second line, a third line, and a fourth line, all of which are connected in parallel;
a first phase input connected to the first line and having a first phase input voltage (V a ), a second phase input connected to the second line and having a second phase input voltage (V b ), and a third phase input connected to the third line and having a third phase input voltage (V c );
a first switch (S A1 ) and a second switch (S A2 ) connected in series on the first line and on opposite sides of a first phase input connection;
a third switch (S B1 ) and a fourth switch (S B2 ) connected in series on the second line and on opposite sides of a second phase input connection;
a fifth switch (S C1 ) and a sixth switch (S C2 ) connected in series on the third line and on opposite sides of a third phase input connection; and
a seventh switch (S F ) on the fourth line; and
a seventh diode (D F ) that is in parallel with the seventh switch (S F ) on the fourth line in the three-phase ac-ac matrix converter;
providing a reference current (i ref );
providing a reference voltage (ν ref );
providing a reference power (P ref );
measuring a peak output resonance current (i p );
measuring output power (P out ); and
changing how current flows through the three-phase ac-ac matrix converter based on one or more control modes,
wherein the three-phase ac-ac matrix converter operates in a power regulation control mode according to rules in the following table:
SWITCHING STATES IN DIFFERENT MODES OF OPERATION IN
POWER REGULATION CONTROL MODE
Output Power &
Conducting
Mode
Resonant Current
Input Voltages
Switches
1
P out < P ref , i p < 0
V b < V c < V a
S A1 , S B2
2
P out < P ref , i p < 0
V c < V b < V a
S A1 , S C2
3
P out < P ref , i p < 0
V a < V c < V b
S B1 , S A2
4
P out < P ref , i p < 0
V c < V a < V b
S B1 , S C2
5
P out < P ref , i p < 0
V b < V a < V c
S C1 , S B2
6
P out < P ref , i p < 0
V a < V b < V c
S C1 , S A2
7
P out > P ref , i p < 0
—
D F
8
i p > 0
—
S F .
14. The method according to claim 13 , wherein the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch are all reverse blocking switches, each including an insulated gate bipolar transistor (IGBT) or a metal oxide semiconductor field effect transistor (MOSFET) in series with a diode.
15. The method according to claim 13 , wherein the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch are switches with built-in reverse blocking functionality.
16. The method according to claim 13 , wherein the control modes include a current regulation control mode, a voltage regulation control mode, and a power regulation control mode.
17. The method according to claim 16 , wherein the control modes are based on zero current switching operations or resonant zero crossing points.Cited by (0)
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